// background.js
chrome.browserAction.onClicked.addListener(
    function () {
        if (chrome.runtime.openOptionsPage) {
            // New way to open options pages, if supported (Chrome 42+).
            chrome.runtime.openOptionsPage();
        } else {
            // Reasonable fallback.
            window.open(chrome.runtime.getURL('options.html'));
        }
    }
);
// alert('a');
